R
rich hand
I have removed tiles from ply and obviously old adhesive is left behind on the ply. How much prep does this surface need before re tiling? Will the new tiles adhere properly if old adhesive is left behind?
Tling over old tile adhesive
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I
Ian
Is it a wall or floor? And how thick is the ply?
T
The D
why have the tiles been removed ??
R
rich hand
the grout cracked. I'm getting the feeling that old adhesive can be tiled over.
T
The D
Why did the grout crack ????
why don't you just remove the ply, and replace it with something more suitable..?
Q
Qwerty
My thoughts precisely. The ply is likely to be your problem!
M
Mr Tiler
this should be in d.i.y lol
R
rich hand
the ply can not be removed. The wrong adhesive was used originally. The job simply means applying the correct adhesive. Although I am a flooring professional, I am not a tiler so wondering how important it is to remove remains of old adhesive. I know what the theory may say but I am wanting practical experience on this matter.
T
The D
What adhesive was used
T
The D
why??
G
Gazzer
In what situation is this ply ? Kitchen, bathroom , shower ????
R
rich hand
We believe standard adhesive was used, Fastflex will be going back down
S
Sean SML Tiling
What happens if the fastflex cracks Whats your next move rich?
If you really believe the old adhesive is the problem, then leaving it as your substrate probably isn't the best idea.. When you say standard adhesive, are we talking non-flexible? Or a standard flexi? If you can get more details, maybe we can be a little more help. I tile on Ply floors occasionally with standard flexi rapid, and rarely have problems.. Saying that, when I have had a problem it's been to do with the Ply shrinking, not the adhesive. Are you tiling a ply floor, or wall?
Martyn Leeds
TF
I think the actual question is, do I have to scrape up all the old adhesive, or can I just go over it??
Dunno, we can't see how good or bad it is. Maybe a picture might help?
A scraper with a blade on it should be able to tackle it..
What does the Tiler say about it?? Is he happy with the prep??
S
Stef
I would remove as much old adhesive as physically possible.
How thick is the ply?
How thick is the ply?
R
rich hand
If the Fastflex cracks I have already advised the owners that the joists should have been strengthened and that 15mm ply (not 6mm) should have been put down. They want to trial this situation rather than remove the bathroom suite, especially since it is hardly costing them anything.
Maybe the old adhesive was flexible standard or simply standard non flexible we do not know. However, it has stuck to the ply well just not the ceramic tiles. Since it has stuck to the ply well I was wondering if it really needed to be removed. It does scrape off if necessary though. There is only a couple of mm depth of adhesive.
The ply is on floor boards beanz.
On this job, I am acting as the tiler, I have done much work with stone floor maintenance including tiling, just not tiling on board.
Maybe the old adhesive was flexible standard or simply standard non flexible we do not know. However, it has stuck to the ply well just not the ceramic tiles. Since it has stuck to the ply well I was wondering if it really needed to be removed. It does scrape off if necessary though. There is only a couple of mm depth of adhesive.
The ply is on floor boards beanz.
On this job, I am acting as the tiler, I have done much work with stone floor maintenance including tiling, just not tiling on board.
R
rich hand
The tiles have come up whole. Actually, there is more adhesive on the tiles than on the floor but the adhesive left on the floor has adhered very well. It's as though the adhesive was not flexible and has fractured in the middle. The tiles are porcelain.
Martyn Leeds
TF
So its 6mm ply??
How well is it stuck down? Nails in every corner and 1 or 2 scattered around, as per Joiners usual prep standard?
Least you can book them in next year for it doing again. Cool.
S
Stef
This floor is not suitable to take tiles as a floor covering.
Rip up that 6mm & replace with 6mm Hardie backer board, make sure there is no deflection (bounce) in the floor or it will always fail.
Rip up that 6mm & replace with 6mm Hardie backer board, make sure there is no deflection (bounce) in the floor or it will always fail.
T
The D
If it was not modified it would probably not have stuck to the porcelain tile at all. Personally I would not be happy tiling on to 6mm ply and would be advising taking the ply out of the equation.
Can’t understand why the ply can’t be removed it would not take much effort to lift 6mm ply and replace with backer board
Can’t understand why the ply can’t be removed it would not take much effort to lift 6mm ply and replace with backer board
G
Gazzer
As Deano says for me too. 
To be fair, that's been explained. Customer wants to try and fix tiles without ripping up the floor 1st. Upto them if they want to throw good money after bad..
Rich, have you tried getting the adhesive off the tiles yet?
T
The D
the customer need to be told that 6mm ply is not going to work.
T
The D
sorry to be blunt but if you tile on to 6mm ply in my bookyou are the type of tiler I am happy to call a cowboy. If you have a problemwith that you can try and justify it
Who says he's advised 6mm Ply!?! The impression I get, is that he's advised 15mm Ply, but they want to try this first. If he's going to get paid to do it twice, because they refuse to listen, good luck to him.
as for having a problem Deano, I'm no sad *** Internet warrior, you fill your boots mate. 😉
as for having a problem Deano, I'm no sad *** Internet warrior, you fill your boots mate. 😉
